?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
xmllite: Drop superfluous casts to self.
[wine.git] / dlls / opengl32 / wgl.c
bloba1422fbfcd4c1d2228f05888faade071a9f35c46
1 /* Window-specific OpenGL functions implementation.
2 *
3 * Copyright (c) 1999 Lionel Ulmer
4 * Copyright (c) 2005 Raphael Junqueira
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <stdarg.h>
25 #include <stdlib.h>
26 #include <string.h>
27
28 #include "windef.h"
29 #include "winbase.h"
30 #include "winuser.h"
31 #include "winreg.h"
32 #include "wingdi.h"
33 #include "winternl.h"
34 #include "winnt.h"
35
36 #include "opengl_ext.h"
37 #include "wine/gdi_driver.h"
38 #include "wine/glu.h"
39 #include "wine/debug.h"
40
41 WINE_DEFAULT_DEBUG_CHANNEL(wgl);
42 WINE_DECLARE_DEBUG_CHANNEL(fps);
43
44 /* handle management */
45
46 #define MAX_WGL_HANDLES 1024
47
48 enum wgl_handle_type
49 {
50 HANDLE_PBUFFER = 0 << 12,
51 HANDLE_CONTEXT = 1 << 12,
52 HANDLE_CONTEXT_V3 = 3 << 12,
53 HANDLE_TYPE_MASK = 15 << 12
54 };
55
56 struct opengl_context
57 {
58 DWORD tid; /* thread that the context is current in */
59 HDC draw_dc; /* current drawing DC */
60 HDC read_dc; /* current reading DC */
61 void (CALLBACK *debug_callback)(GLenum, GLenum, GLuint, GLenum,
62 GLsizei, const GLchar *, const void *); /* debug callback */
63 const void *debug_user; /* debug user parameter */
64 GLubyte *extensions; /* extension string */
65 GLuint *disabled_exts; /* indices of disabled extensions */
66 struct wgl_context *drv_ctx; /* driver context */
67 };
68
69 struct wgl_handle
70 {
71 UINT handle;
72 struct opengl_funcs *funcs;
73 union
74 {
75 struct opengl_context *context; /* for HANDLE_CONTEXT */
76 struct wgl_pbuffer *pbuffer; /* for HANDLE_PBUFFER */
77 struct wgl_handle *next; /* for free handles */
78 } u;
79 };
80
81 static struct wgl_handle wgl_handles[MAX_WGL_HANDLES];
82 static struct wgl_handle *next_free;
83 static unsigned int handle_count;
84
85 static CRITICAL_SECTION wgl_section;
86 static CRITICAL_SECTION_DEBUG critsect_debug =
87 {
88 0, 0, &wgl_section,
89 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
90 0, 0, { (DWORD_PTR)(__FILE__ ": wgl_section") }
91 };
92 static CRITICAL_SECTION wgl_section = { &critsect_debug, -1, 0, 0, 0, 0 };
93
94 static const MAT2 identity = { {0,1},{0,0},{0,0},{0,1} };
95
96 static inline HANDLE next_handle( struct wgl_handle *ptr, enum wgl_handle_type type )
97 {
98 WORD generation = HIWORD( ptr->handle ) + 1;
99 if (!generation) generation++;
100 ptr->handle = MAKELONG( ptr - wgl_handles, generation ) | type;
101 return ULongToHandle( ptr->handle );
102 }
103
104 /* the current context is assumed valid and doesn't need locking */
105 static inline struct wgl_handle *get_current_context_ptr(void)
106 {
107 if (!NtCurrentTeb()->glCurrentRC) return NULL;
108 return &wgl_handles[LOWORD(NtCurrentTeb()->glCurrentRC) & ~HANDLE_TYPE_MASK];
109 }
110
111 static struct wgl_handle *get_handle_ptr( HANDLE handle, enum wgl_handle_type type )
112 {
113 unsigned int index = LOWORD( handle ) & ~HANDLE_TYPE_MASK;
114
115 EnterCriticalSection( &wgl_section );
116 if (index < handle_count && ULongToHandle(wgl_handles[index].handle) == handle)
117 return &wgl_handles[index];
118
119 LeaveCriticalSection( &wgl_section );
120 SetLastError( ERROR_INVALID_HANDLE );
121 return NULL;
122 }
123
124 static void release_handle_ptr( struct wgl_handle *ptr )
125 {
126 if (ptr) LeaveCriticalSection( &wgl_section );
127 }
128
129 static HANDLE alloc_handle( enum wgl_handle_type type, struct opengl_funcs *funcs, void *user_ptr )
130 {
131 HANDLE handle = 0;
132 struct wgl_handle *ptr = NULL;
133
134 EnterCriticalSection( &wgl_section );
135 if ((ptr = next_free))
136 next_free = next_free->u.next;
137 else if (handle_count < MAX_WGL_HANDLES)
138 ptr = &wgl_handles[handle_count++];
139
140 if (ptr)
141 {
142 ptr->funcs = funcs;
143 ptr->u.context = user_ptr;
144 handle = next_handle( ptr, type );
145 }
146 else SetLastError( ERROR_NOT_ENOUGH_MEMORY );
147 LeaveCriticalSection( &wgl_section );
148 return handle;
149 }
150
151 static void free_handle_ptr( struct wgl_handle *ptr )
152 {
153 ptr->handle |= 0xffff;
154 ptr->u.next = next_free;
155 ptr->funcs = NULL;
156 next_free = ptr;
157 LeaveCriticalSection( &wgl_section );
158 }
159
160 static inline enum wgl_handle_type get_current_context_type(void)
161 {
162 if (!NtCurrentTeb()->glCurrentRC) return HANDLE_CONTEXT;
163 return LOWORD(NtCurrentTeb()->glCurrentRC) & HANDLE_TYPE_MASK;
164 }
165
166 /***********************************************************************
167 * wglCopyContext (OPENGL32.@)
168 */
169 BOOL WINAPI wglCopyContext(HGLRC hglrcSrc, HGLRC hglrcDst, UINT mask)
170 {
171 struct wgl_handle *src, *dst;
172 BOOL ret = FALSE;
173
174 if (!(src = get_handle_ptr( hglrcSrc, HANDLE_CONTEXT ))) return FALSE;
175 if ((dst = get_handle_ptr( hglrcDst, HANDLE_CONTEXT )))
176 {
177 if (src->funcs != dst->funcs) SetLastError( ERROR_INVALID_HANDLE );
178 else ret = src->funcs->wgl.p_wglCopyContext( src->u.context->drv_ctx,
179 dst->u.context->drv_ctx, mask );
180 }
181 release_handle_ptr( dst );
182 release_handle_ptr( src );
183 return ret;
184 }
185
186 /***********************************************************************
187 * wglDeleteContext (OPENGL32.@)
188 */
189 BOOL WINAPI wglDeleteContext(HGLRC hglrc)
190 {
191 struct wgl_handle *ptr = get_handle_ptr( hglrc, HANDLE_CONTEXT );
192
193 if (!ptr) return FALSE;
194
195 if (ptr->u.context->tid && ptr->u.context->tid != GetCurrentThreadId())
196 {
197 SetLastError( ERROR_BUSY );
198 release_handle_ptr( ptr );
199 return FALSE;
200 }
201 if (hglrc == NtCurrentTeb()->glCurrentRC) wglMakeCurrent( 0, 0 );
202 ptr->funcs->wgl.p_wglDeleteContext( ptr->u.context->drv_ctx );
203 HeapFree( GetProcessHeap(), 0, ptr->u.context->disabled_exts );
204 HeapFree( GetProcessHeap(), 0, ptr->u.context->extensions );
205 HeapFree( GetProcessHeap(), 0, ptr->u.context );
206 free_handle_ptr( ptr );
207 return TRUE;
208 }
209
210 /***********************************************************************
211 * wglMakeCurrent (OPENGL32.@)
212 */
213 BOOL WINAPI wglMakeCurrent(HDC hdc, HGLRC hglrc)
214 {
215 BOOL ret = TRUE;
216 struct wgl_handle *ptr, *prev = get_current_context_ptr();
217
218 if (hglrc)
219 {
220 if (!(ptr = get_handle_ptr( hglrc, HANDLE_CONTEXT ))) return FALSE;
221 if (!ptr->u.context->tid || ptr->u.context->tid == GetCurrentThreadId())
222 {
223 ret = ptr->funcs->wgl.p_wglMakeCurrent( hdc, ptr->u.context->drv_ctx );
224 if (ret)
225 {
226 if (prev) prev->u.context->tid = 0;
227 ptr->u.context->tid = GetCurrentThreadId();
228 ptr->u.context->draw_dc = hdc;
229 ptr->u.context->read_dc = hdc;
230 NtCurrentTeb()->glCurrentRC = hglrc;
231 NtCurrentTeb()->glTable = ptr->funcs;
232 }
233 }
234 else
235 {
236 SetLastError( ERROR_BUSY );
237 ret = FALSE;
238 }
239 release_handle_ptr( ptr );
240 }
241 else if (prev)
242 {
243 if (!prev->funcs->wgl.p_wglMakeCurrent( 0, NULL )) return FALSE;
244 prev->u.context->tid = 0;
245 NtCurrentTeb()->glCurrentRC = 0;
246 NtCurrentTeb()->glTable = &null_opengl_funcs;
247 }
248 else if (!hdc)
249 {
250 SetLastError( ERROR_INVALID_HANDLE );
251 ret = FALSE;
252 }
253 return ret;
254 }
255
256 /***********************************************************************
257 * wglCreateContextAttribsARB
258 *
259 * Provided by the WGL_ARB_create_context extension.
260 */
261 HGLRC WINAPI wglCreateContextAttribsARB( HDC hdc, HGLRC share, const int *attribs )
262 {
263 HGLRC ret = 0;
264 struct wgl_context *drv_ctx;
265 struct wgl_handle *share_ptr = NULL;
266 struct opengl_context *context;
267 struct opengl_funcs *funcs = get_dc_funcs( hdc );
268
269 if (!funcs)
270 {
271 SetLastError( ERROR_DC_NOT_FOUND );
272 return 0;
273 }
274 if (!funcs->ext.p_wglCreateContextAttribsARB) return 0;
275 if (share && !(share_ptr = get_handle_ptr( share, HANDLE_CONTEXT )))
276 {
277 SetLastError( ERROR_INVALID_OPERATION );
278 return 0;
279 }
280 if ((drv_ctx = funcs->ext.p_wglCreateContextAttribsARB( hdc,
281 share_ptr ? share_ptr->u.context->drv_ctx : NULL, attribs )))
282 {
283 if ((context = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*context) )))
284 {
285 enum wgl_handle_type type = HANDLE_CONTEXT;
286
287 if (attribs)
288 {
289 while (*attribs)
290 {
291 if (attribs[0] == WGL_CONTEXT_MAJOR_VERSION_ARB)
292 {
293 if (attribs[1] >= 3)
294 type = HANDLE_CONTEXT_V3;
295 break;
296 }
297 attribs += 2;
298 }
299 }
300
301 context->drv_ctx = drv_ctx;
302 if (!(ret = alloc_handle( type, funcs, context )))
303 HeapFree( GetProcessHeap(), 0, context );
304 }
305 if (!ret) funcs->wgl.p_wglDeleteContext( drv_ctx );
306 }
307 release_handle_ptr( share_ptr );
308 return ret;
309
310 }
311
312 /***********************************************************************
313 * wglMakeContextCurrentARB
314 *
315 * Provided by the WGL_ARB_make_current_read extension.
316 */
317 BOOL WINAPI wglMakeContextCurrentARB( HDC draw_hdc, HDC read_hdc, HGLRC hglrc )
318 {
319 BOOL ret = TRUE;
320 struct wgl_handle *ptr, *prev = get_current_context_ptr();
321
322 if (hglrc)
323 {
324 if (!(ptr = get_handle_ptr( hglrc, HANDLE_CONTEXT ))) return FALSE;
325 if (!ptr->u.context->tid || ptr->u.context->tid == GetCurrentThreadId())
326 {
327 ret = (ptr->funcs->ext.p_wglMakeContextCurrentARB &&
328 ptr->funcs->ext.p_wglMakeContextCurrentARB( draw_hdc, read_hdc,
329 ptr->u.context->drv_ctx ));
330 if (ret)
331 {
332 if (prev) prev->u.context->tid = 0;
333 ptr->u.context->tid = GetCurrentThreadId();
334 ptr->u.context->draw_dc = draw_hdc;
335 ptr->u.context->read_dc = read_hdc;
336 NtCurrentTeb()->glCurrentRC = hglrc;
337 NtCurrentTeb()->glTable = ptr->funcs;
338 }
339 }
340 else
341 {
342 SetLastError( ERROR_BUSY );
343 ret = FALSE;
344 }
345 release_handle_ptr( ptr );
346 }
347 else if (prev)
348 {
349 if (!prev->funcs->wgl.p_wglMakeCurrent( 0, NULL )) return FALSE;
350 prev->u.context->tid = 0;
351 NtCurrentTeb()->glCurrentRC = 0;
352 NtCurrentTeb()->glTable = &null_opengl_funcs;
353 }
354 return ret;
355 }
356
357 /***********************************************************************
358 * wglGetCurrentReadDCARB
359 *
360 * Provided by the WGL_ARB_make_current_read extension.
361 */
362 HDC WINAPI wglGetCurrentReadDCARB(void)
363 {
364 struct wgl_handle *ptr = get_current_context_ptr();
365
366 if (!ptr) return 0;
367 return ptr->u.context->read_dc;
368 }
369
370 /***********************************************************************
371 * wglShareLists (OPENGL32.@)
372 */
373 BOOL WINAPI wglShareLists(HGLRC hglrcSrc, HGLRC hglrcDst)
374 {
375 BOOL ret = FALSE;
376 struct wgl_handle *src, *dst;
377
378 if (!(src = get_handle_ptr( hglrcSrc, HANDLE_CONTEXT ))) return FALSE;
379 if ((dst = get_handle_ptr( hglrcDst, HANDLE_CONTEXT )))
380 {
381 if (src->funcs != dst->funcs) SetLastError( ERROR_INVALID_HANDLE );
382 else ret = src->funcs->wgl.p_wglShareLists( src->u.context->drv_ctx, dst->u.context->drv_ctx );
383 }
384 release_handle_ptr( dst );
385 release_handle_ptr( src );
386 return ret;
387 }
388
389 /***********************************************************************
390 * wglGetCurrentDC (OPENGL32.@)
391 */
392 HDC WINAPI wglGetCurrentDC(void)
393 {
394 struct wgl_handle *ptr = get_current_context_ptr();
395
396 if (!ptr) return 0;
397 return ptr->u.context->draw_dc;
398 }
399
400 /***********************************************************************
401 * wgl_create_context wrapper for hooking
402 */
403 static HGLRC wgl_create_context(HDC hdc)
404 {
405 HGLRC ret = 0;
406 struct wgl_context *drv_ctx;
407 struct opengl_context *context;
408 struct opengl_funcs *funcs = get_dc_funcs( hdc );
409
410 if (!funcs) return 0;
411 if (!(drv_ctx = funcs->wgl.p_wglCreateContext( hdc ))) return 0;
412 if ((context = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*context) )))
413 {
414 context->drv_ctx = drv_ctx;
415 if (!(ret = alloc_handle( HANDLE_CONTEXT, funcs, context )))
416 HeapFree( GetProcessHeap(), 0, context );
417 }
418 if (!ret) funcs->wgl.p_wglDeleteContext( drv_ctx );
419 return ret;
420 }
421
422 /***********************************************************************
423 * wglCreateContext (OPENGL32.@)
424 */
425 HGLRC WINAPI wglCreateContext(HDC hdc)
426 {
427 return wgl_create_context(hdc);
428 }
429
430 /***********************************************************************
431 * wglGetCurrentContext (OPENGL32.@)
432 */
433 HGLRC WINAPI wglGetCurrentContext(void)
434 {
435 return NtCurrentTeb()->glCurrentRC;
436 }
437
438 /***********************************************************************
439 * wglDescribePixelFormat (OPENGL32.@)
440 */
441 INT WINAPI wglDescribePixelFormat(HDC hdc, INT format, UINT size, PIXELFORMATDESCRIPTOR *descr )
442 {
443 struct opengl_funcs *funcs = get_dc_funcs( hdc );
444 if (!funcs) return 0;
445 return funcs->wgl.p_wglDescribePixelFormat( hdc, format, size, descr );
446 }
447
448 /***********************************************************************
449 * wglChoosePixelFormat (OPENGL32.@)
450 */
451 INT WINAPI wglChoosePixelFormat(HDC hdc, const PIXELFORMATDESCRIPTOR* ppfd)
452 {
453 PIXELFORMATDESCRIPTOR format, best;
454 int i, count, best_format;
455 int bestDBuffer = -1, bestStereo = -1;
456
457 TRACE_(wgl)( "%p %p: size %u version %u flags %u type %u color %u %u,%u,%u,%u "
458 "accum %u depth %u stencil %u aux %u\n",
459 hdc, ppfd, ppfd->nSize, ppfd->nVersion, ppfd->dwFlags, ppfd->iPixelType,
460 ppfd->cColorBits, ppfd->cRedBits, ppfd->cGreenBits, ppfd->cBlueBits, ppfd->cAlphaBits,
461 ppfd->cAccumBits, ppfd->cDepthBits, ppfd->cStencilBits, ppfd->cAuxBuffers );
462
463 count = wglDescribePixelFormat( hdc, 0, 0, NULL );
464 if (!count) return 0;
465
466 best_format = 0;
467 best.dwFlags = 0;
468 best.cAlphaBits = -1;
469 best.cColorBits = -1;
470 best.cDepthBits = -1;
471 best.cStencilBits = -1;
472 best.cAuxBuffers = -1;
473
474 for (i = 1; i <= count; i++)
475 {
476 if (!wglDescribePixelFormat( hdc, i, sizeof(format), &format )) continue;
477
478 if ((ppfd->iPixelType == PFD_TYPE_COLORINDEX) != (format.iPixelType == PFD_TYPE_COLORINDEX))
479 {
480 TRACE( "pixel type mismatch for iPixelFormat=%d\n", i );
481 continue;
482 }
483
484 /* only use bitmap capable for formats for bitmap rendering */
485 if( (ppfd->dwFlags & PFD_DRAW_TO_BITMAP) != (format.dwFlags & PFD_DRAW_TO_BITMAP))
486 {
487 TRACE( "PFD_DRAW_TO_BITMAP mismatch for iPixelFormat=%d\n", i );
488 continue;
489 }
490
491 /* The behavior of PDF_STEREO/PFD_STEREO_DONTCARE and PFD_DOUBLEBUFFER / PFD_DOUBLEBUFFER_DONTCARE
492 * is not very clear on MSDN. They specify that ChoosePixelFormat tries to match pixel formats
493 * with the flag (PFD_STEREO / PFD_DOUBLEBUFFERING) set. Otherwise it says that it tries to match
494 * formats without the given flag set.
495 * A test on Windows using a Radeon 9500pro on WinXP (the driver doesn't support Stereo)
496 * has indicated that a format without stereo is returned when stereo is unavailable.
497 * So in case PFD_STEREO is set, formats that support it should have priority above formats
498 * without. In case PFD_STEREO_DONTCARE is set, stereo is ignored.
499 *
500 * To summarize the following is most likely the correct behavior:
501 * stereo not set -> prefer non-stereo formats, but also accept stereo formats
502 * stereo set -> prefer stereo formats, but also accept non-stereo formats
503 * stereo don't care -> it doesn't matter whether we get stereo or not
504 *
505 * In Wine we will treat non-stereo the same way as don't care because it makes
506 * format selection even more complicated and second drivers with Stereo advertise
507 * each format twice anyway.
508 */
509
510 /* Doublebuffer, see the comments above */
511 if (!(ppfd->dwFlags & PFD_DOUBLEBUFFER_DONTCARE))
512 {
513 if (((ppfd->dwFlags & PFD_DOUBLEBUFFER) != bestDBuffer) &&
514 ((format.dwFlags & PFD_DOUBLEBUFFER) == (ppfd->dwFlags & PFD_DOUBLEBUFFER)))
515 goto found;
516
517 if (bestDBuffer != -1 && (format.dwFlags & PFD_DOUBLEBUFFER) != bestDBuffer) continue;
518 }
519 else if (!best_format)
520 goto found;
521
522 /* Stereo, see the comments above. */
523 if (!(ppfd->dwFlags & PFD_STEREO_DONTCARE))
524 {
525 if (((ppfd->dwFlags & PFD_STEREO) != bestStereo) &&
526 ((format.dwFlags & PFD_STEREO) == (ppfd->dwFlags & PFD_STEREO)))
527 goto found;
528
529 if (bestStereo != -1 && (format.dwFlags & PFD_STEREO) != bestStereo) continue;
530 }
531 else if (!best_format)
532 goto found;
533
534 /* Below we will do a number of checks to select the 'best' pixelformat.
535 * We assume the precedence cColorBits > cAlphaBits > cDepthBits > cStencilBits -> cAuxBuffers.
536 * The code works by trying to match the most important options as close as possible.
537 * When a reasonable format is found, we will try to match more options.
538 * It appears (see the opengl32 test) that Windows opengl drivers ignore options
539 * like cColorBits, cAlphaBits and friends if they are set to 0, so they are considered
540 * as DONTCARE. At least Serious Sam TSE relies on this behavior. */
541
542 if (ppfd->cColorBits)
543 {
544 if (((ppfd->cColorBits > best.cColorBits) && (format.cColorBits > best.cColorBits)) ||
545 ((format.cColorBits >= ppfd->cColorBits) && (format.cColorBits < best.cColorBits)))
546 goto found;
547
548 if (best.cColorBits != format.cColorBits) /* Do further checks if the format is compatible */
549 {
550 TRACE( "color mismatch for iPixelFormat=%d\n", i );
551 continue;
552 }
553 }
554 if (ppfd->cAlphaBits)
555 {
556 if (((ppfd->cAlphaBits > best.cAlphaBits) && (format.cAlphaBits > best.cAlphaBits)) ||
557 ((format.cAlphaBits >= ppfd->cAlphaBits) && (format.cAlphaBits < best.cAlphaBits)))
558 goto found;
559
560 if (best.cAlphaBits != format.cAlphaBits)
561 {
562 TRACE( "alpha mismatch for iPixelFormat=%d\n", i );
563 continue;
564 }
565 }
566 if (ppfd->cDepthBits)
567 {
568 if (((ppfd->cDepthBits > best.cDepthBits) && (format.cDepthBits > best.cDepthBits)) ||
569 ((format.cDepthBits >= ppfd->cDepthBits) && (format.cDepthBits < best.cDepthBits)))
570 goto found;
571
572 if (best.cDepthBits != format.cDepthBits)
573 {
574 TRACE( "depth mismatch for iPixelFormat=%d\n", i );
575 continue;
576 }
577 }
578 if (ppfd->cStencilBits)
579 {
580 if (((ppfd->cStencilBits > best.cStencilBits) && (format.cStencilBits > best.cStencilBits)) ||
581 ((format.cStencilBits >= ppfd->cStencilBits) && (format.cStencilBits < best.cStencilBits)))
582 goto found;
583
584 if (best.cStencilBits != format.cStencilBits)
585 {
586 TRACE( "stencil mismatch for iPixelFormat=%d\n", i );
587 continue;
588 }
589 }
590 if (ppfd->cAuxBuffers)
591 {
592 if (((ppfd->cAuxBuffers > best.cAuxBuffers) && (format.cAuxBuffers > best.cAuxBuffers)) ||
593 ((format.cAuxBuffers >= ppfd->cAuxBuffers) && (format.cAuxBuffers < best.cAuxBuffers)))
594 goto found;
595
596 if (best.cAuxBuffers != format.cAuxBuffers)
597 {
598 TRACE( "aux mismatch for iPixelFormat=%d\n", i );
599 continue;
600 }
601 }
602 continue;
603
604 found:
605 best_format = i;
606 best = format;
607 bestDBuffer = format.dwFlags & PFD_DOUBLEBUFFER;
608 bestStereo = format.dwFlags & PFD_STEREO;
609 }
610
611 TRACE( "returning %u\n", best_format );
612 return best_format;
613 }
614
615 /***********************************************************************
616 * wglGetPixelFormat (OPENGL32.@)
617 */
618 INT WINAPI wglGetPixelFormat(HDC hdc)
619 {
620 struct opengl_funcs *funcs = get_dc_funcs( hdc );
621 if (!funcs)
622 {
623 SetLastError( ERROR_INVALID_PIXEL_FORMAT );
624 return 0;
625 }
626 return funcs->wgl.p_wglGetPixelFormat( hdc );
627 }
628
629 /***********************************************************************
630 * wglSetPixelFormat(OPENGL32.@)
631 */
632 BOOL WINAPI wglSetPixelFormat( HDC hdc, INT format, const PIXELFORMATDESCRIPTOR *descr )
633 {
634 struct opengl_funcs *funcs = get_dc_funcs( hdc );
635 if (!funcs) return FALSE;
636 return funcs->wgl.p_wglSetPixelFormat( hdc, format, descr );
637 }
638
639 /***********************************************************************
640 * wglSwapBuffers (OPENGL32.@)
641 */
642 BOOL WINAPI DECLSPEC_HOTPATCH wglSwapBuffers( HDC hdc )
643 {
644 const struct opengl_funcs *funcs = get_dc_funcs( hdc );
645
646 if (!funcs || !funcs->wgl.p_wglSwapBuffers) return FALSE;
647 if (!funcs->wgl.p_wglSwapBuffers( hdc )) return FALSE;
648
649 if (TRACE_ON(fps))
650 {
651 static long prev_time, start_time;
652 static unsigned long frames, frames_total;
653
654 DWORD time = GetTickCount();
655 frames++;
656 frames_total++;
657 /* every 1.5 seconds */
658 if (time - prev_time > 1500)
659 {
660 TRACE_(fps)("@ approx %.2ffps, total %.2ffps\n",
661 1000.0*frames/(time - prev_time), 1000.0*frames_total/(time - start_time));
662 prev_time = time;
663 frames = 0;
664 if (start_time == 0) start_time = time;
665 }
666 }
667 return TRUE;
668 }
669
670 /***********************************************************************
671 * wglCreateLayerContext (OPENGL32.@)
672 */
673 HGLRC WINAPI wglCreateLayerContext(HDC hdc,
674 int iLayerPlane) {
675 TRACE("(%p,%d)\n", hdc, iLayerPlane);
676
677 if (iLayerPlane == 0) {
678 return wgl_create_context(hdc);
679 }
680 FIXME("no handler for layer %d\n", iLayerPlane);
681
682 return NULL;
683 }
684
685 /***********************************************************************
686 * wglDescribeLayerPlane (OPENGL32.@)
687 */
688 BOOL WINAPI wglDescribeLayerPlane(HDC hdc,
689 int iPixelFormat,
690 int iLayerPlane,
691 UINT nBytes,
692 LPLAYERPLANEDESCRIPTOR plpd) {
693 FIXME("(%p,%d,%d,%d,%p)\n", hdc, iPixelFormat, iLayerPlane, nBytes, plpd);
694
695 return FALSE;
696 }
697
698 /***********************************************************************
699 * wglGetLayerPaletteEntries (OPENGL32.@)
700 */
701 int WINAPI wglGetLayerPaletteEntries(HDC hdc,
702 int iLayerPlane,
703 int iStart,
704 int cEntries,
705 const COLORREF *pcr) {
706 FIXME("(): stub!\n");
707
708 return 0;
709 }
710
711 static BOOL filter_extensions(const char *extensions, GLubyte **exts_list, GLuint **disabled_exts);
712
713 void WINAPI glGetIntegerv(GLenum pname, GLint *data)
714 {
715 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
716
717 TRACE("(%d, %p)\n", pname, data);
718 if (pname == GL_NUM_EXTENSIONS)
719 {
720 struct wgl_handle *ptr = get_current_context_ptr();
721
722 if (ptr->u.context->disabled_exts ||
723 filter_extensions(NULL, NULL, &ptr->u.context->disabled_exts))
724 {
725 const GLuint *disabled_exts = ptr->u.context->disabled_exts;
726 GLint count, disabled_count = 0;
727
728 funcs->gl.p_glGetIntegerv(pname, &count);
729 while (*disabled_exts++ != ~0u)
730 disabled_count++;
731 *data = count - disabled_count;
732 return;
733 }
734 }
735 funcs->gl.p_glGetIntegerv(pname, data);
736 }
737
738 const GLubyte * WINAPI glGetStringi(GLenum name, GLuint index)
739 {
740 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
741
742 TRACE("(%d, %d)\n", name, index);
743 if (!funcs->ext.p_glGetStringi)
744 {
745 void **func_ptr = (void **)&funcs->ext.p_glGetStringi;
746
747 *func_ptr = funcs->wgl.p_wglGetProcAddress("glGetStringi");
748 }
749
750 if (name == GL_EXTENSIONS)
751 {
752 struct wgl_handle *ptr = get_current_context_ptr();
753
754 if (ptr->u.context->disabled_exts ||
755 filter_extensions(NULL, NULL, &ptr->u.context->disabled_exts))
756 {
757 const GLuint *disabled_exts = ptr->u.context->disabled_exts;
758 unsigned int disabled_count = 0;
759
760 while (index + disabled_count >= *disabled_exts++)
761 disabled_count++;
762 return funcs->ext.p_glGetStringi(name, index + disabled_count);
763 }
764 }
765 return funcs->ext.p_glGetStringi(name, index);
766 }
767
768 /* check if the extension is present in the list */
769 static BOOL has_extension( const char *list, const char *ext, size_t len )
770 {
771 if (!list)
772 {
773 const char *gl_ext;
774 unsigned int i;
775 GLint extensions_count;
776
777 glGetIntegerv(GL_NUM_EXTENSIONS, &extensions_count);
778 for (i = 0; i < extensions_count; ++i)
779 {
780 gl_ext = (const char *)glGetStringi(GL_EXTENSIONS, i);
781 if (!strncmp(gl_ext, ext, len) && !gl_ext[len])
782 return TRUE;
783 }
784 return FALSE;
785 }
786
787 while (list)
788 {
789 while (*list == ' ') list++;
790 if (!strncmp( list, ext, len ) && (!list[len] || list[len] == ' ')) return TRUE;
791 list = strchr( list, ' ' );
792 }
793 return FALSE;
794 }
795
796 static int compar(const void *elt_a, const void *elt_b) {
797 return strcmp(((const OpenGL_extension *) elt_a)->name,
798 ((const OpenGL_extension *) elt_b)->name);
799 }
800
801 /* Check if a GL extension is supported */
802 static BOOL is_extension_supported(const char* extension)
803 {
804 enum wgl_handle_type type = get_current_context_type();
805 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
806 const char *gl_ext_string = NULL;
807 size_t len;
808
809 TRACE("Checking for extension '%s'\n", extension);
810
811 if (type == HANDLE_CONTEXT)
812 {
813 gl_ext_string = (const char*)glGetString(GL_EXTENSIONS);
814 if (!gl_ext_string)
815 {
816 ERR("No OpenGL extensions found, check if your OpenGL setup is correct!\n");
817 return FALSE;
818 }
819 }
820
821 /* We use the GetProcAddress function from the display driver to retrieve function pointers
822 * for OpenGL and WGL extensions. In case of winex11.drv the OpenGL extension lookup is done
823 * using glXGetProcAddress. This function is quite unreliable in the sense that its specs don't
824 * require the function to return NULL when an extension isn't found. For this reason we check
825 * if the OpenGL extension required for the function we are looking up is supported. */
826
827 while ((len = strcspn(extension, " ")) != 0)
828 {
829 /* Check if the extension is part of the GL extension string to see if it is supported. */
830 if (has_extension(gl_ext_string, extension, len))
831 return TRUE;
832
833 /* In general an OpenGL function starts as an ARB/EXT extension and at some stage
834 * it becomes part of the core OpenGL library and can be reached without the ARB/EXT
835 * suffix as well. In the extension table, these functions contain GL_VERSION_major_minor.
836 * Check if we are searching for a core GL function */
837 if(strncmp(extension, "GL_VERSION_", 11) == 0)
838 {
839 const GLubyte *gl_version = funcs->gl.p_glGetString(GL_VERSION);
840 const char *version = extension + 11; /* Move past 'GL_VERSION_' */
841
842 if(!gl_version) {
843 ERR("No OpenGL version found!\n");
844 return FALSE;
845 }
846
847 /* Compare the major/minor version numbers of the native OpenGL library and what is required by the function.
848 * The gl_version string is guaranteed to have at least a major/minor and sometimes it has a release number as well. */
849 if( (gl_version[0] > version[0]) || ((gl_version[0] == version[0]) && (gl_version[2] >= version[2])) ) {
850 return TRUE;
851 }
852 WARN("The function requires OpenGL version '%c.%c' while your drivers only provide '%c.%c'\n", version[0], version[2], gl_version[0], gl_version[2]);
853 }
854
855 if (extension[len] == ' ') len++;
856 extension += len;
857 }
858
859 return FALSE;
860 }
861
862 /***********************************************************************
863 * wglGetProcAddress (OPENGL32.@)
864 */
865 PROC WINAPI wglGetProcAddress( LPCSTR name )
866 {
867 struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
868 void **func_ptr;
869 OpenGL_extension ext;
870 const OpenGL_extension *ext_ret;
871
872 if (!name) return NULL;
873
874 /* Without an active context opengl32 doesn't know to what
875 * driver it has to dispatch wglGetProcAddress.
876 */
877 if (!get_current_context_ptr())
878 {
879 WARN("No active WGL context found\n");
880 return NULL;
881 }
882
883 ext.name = name;
884 ext_ret = bsearch(&ext, extension_registry, extension_registry_size, sizeof(ext), compar);
885 if (!ext_ret)
886 {
887 WARN("Function %s unknown\n", name);
888 return NULL;
889 }
890
891 func_ptr = (void **)&funcs->ext + (ext_ret - extension_registry);
892 if (!*func_ptr)
893 {
894 void *driver_func = funcs->wgl.p_wglGetProcAddress( name );
895
896 if (!is_extension_supported(ext_ret->extension))
897 {
898 unsigned int i;
899 static const struct { const char *name, *alt; } alternatives[] =
900 {
901 { "glCopyTexSubImage3DEXT", "glCopyTexSubImage3D" }, /* needed by RuneScape */
902 { "glVertexAttribDivisor", "glVertexAttribDivisorARB"}, /* needed by Caffeine */
903 };
904
905 for (i = 0; i < ARRAY_SIZE(alternatives); i++)
906 {
907 if (strcmp( name, alternatives[i].name )) continue;
908 WARN("Extension %s required for %s not supported, trying %s\n",
909 ext_ret->extension, name, alternatives[i].alt );
910 return wglGetProcAddress( alternatives[i].alt );
911 }
912 WARN("Extension %s required for %s not supported\n", ext_ret->extension, name);
913 return NULL;
914 }
915
916 if (driver_func == NULL)
917 {
918 WARN("Function %s not supported by driver\n", name);
919 return NULL;
920 }
921 *func_ptr = driver_func;
922 }
923
924 TRACE("returning %s -> %p\n", name, ext_ret->func);
925 return ext_ret->func;
926 }
927
928 /***********************************************************************
929 * wglRealizeLayerPalette (OPENGL32.@)
930 */
931 BOOL WINAPI wglRealizeLayerPalette(HDC hdc,
932 int iLayerPlane,
933 BOOL bRealize) {
934 FIXME("()\n");
935
936 return FALSE;
937 }
938
939 /***********************************************************************
940 * wglSetLayerPaletteEntries (OPENGL32.@)
941 */
942 int WINAPI wglSetLayerPaletteEntries(HDC hdc,
943 int iLayerPlane,
944 int iStart,
945 int cEntries,
946 const COLORREF *pcr) {
947 FIXME("(): stub!\n");
948
949 return 0;
950 }
951
952 /***********************************************************************
953 * wglGetDefaultProcAddress (OPENGL32.@)
954 */
955 PROC WINAPI wglGetDefaultProcAddress( LPCSTR name )
956 {
957 FIXME( "%s: stub\n", debugstr_a(name));
958 return NULL;
959 }
960
961 /***********************************************************************
962 * wglSwapLayerBuffers (OPENGL32.@)
963 */
964 BOOL WINAPI wglSwapLayerBuffers(HDC hdc,
965 UINT fuPlanes) {
966 TRACE("(%p, %08x)\n", hdc, fuPlanes);
967
968 if (fuPlanes & WGL_SWAP_MAIN_PLANE) {
969 if (!wglSwapBuffers( hdc )) return FALSE;
970 fuPlanes &= ~WGL_SWAP_MAIN_PLANE;
971 }
972
973 if (fuPlanes) {
974 WARN("Following layers unhandled: %08x\n", fuPlanes);
975 }
976
977 return TRUE;
978 }
979
980 /***********************************************************************
981 * wglBindTexImageARB
982 *
983 * Provided by the WGL_ARB_render_texture extension.
984 */
985 BOOL WINAPI wglBindTexImageARB( HPBUFFERARB handle, int buffer )
986 {
987 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
988 BOOL ret;
989
990 if (!ptr) return FALSE;
991 ret = ptr->funcs->ext.p_wglBindTexImageARB( ptr->u.pbuffer, buffer );
992 release_handle_ptr( ptr );
993 return ret;
994 }
995
996 /***********************************************************************
997 * wglReleaseTexImageARB
998 *
999 * Provided by the WGL_ARB_render_texture extension.
1000 */
1001 BOOL WINAPI wglReleaseTexImageARB( HPBUFFERARB handle, int buffer )
1002 {
1003 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1004 BOOL ret;
1005
1006 if (!ptr) return FALSE;
1007 ret = ptr->funcs->ext.p_wglReleaseTexImageARB( ptr->u.pbuffer, buffer );
1008 release_handle_ptr( ptr );
1009 return ret;
1010 }
1011
1012 /***********************************************************************
1013 * wglSetPbufferAttribARB
1014 *
1015 * Provided by the WGL_ARB_render_texture extension.
1016 */
1017 BOOL WINAPI wglSetPbufferAttribARB( HPBUFFERARB handle, const int *attribs )
1018 {
1019 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1020 BOOL ret;
1021
1022 if (!ptr) return FALSE;
1023 ret = ptr->funcs->ext.p_wglSetPbufferAttribARB( ptr->u.pbuffer, attribs );
1024 release_handle_ptr( ptr );
1025 return ret;
1026 }
1027
1028 /***********************************************************************
1029 * wglCreatePbufferARB
1030 *
1031 * Provided by the WGL_ARB_pbuffer extension.
1032 */
1033 HPBUFFERARB WINAPI wglCreatePbufferARB( HDC hdc, int format, int width, int height, const int *attribs )
1034 {
1035 HPBUFFERARB ret;
1036 struct wgl_pbuffer *pbuffer;
1037 struct opengl_funcs *funcs = get_dc_funcs( hdc );
1038
1039 if (!funcs || !funcs->ext.p_wglCreatePbufferARB) return 0;
1040 if (!(pbuffer = funcs->ext.p_wglCreatePbufferARB( hdc, format, width, height, attribs ))) return 0;
1041 ret = alloc_handle( HANDLE_PBUFFER, funcs, pbuffer );
1042 if (!ret) funcs->ext.p_wglDestroyPbufferARB( pbuffer );
1043 return ret;
1044 }
1045
1046 /***********************************************************************
1047 * wglGetPbufferDCARB
1048 *
1049 * Provided by the WGL_ARB_pbuffer extension.
1050 */
1051 HDC WINAPI wglGetPbufferDCARB( HPBUFFERARB handle )
1052 {
1053 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1054 HDC ret;
1055
1056 if (!ptr) return 0;
1057 ret = ptr->funcs->ext.p_wglGetPbufferDCARB( ptr->u.pbuffer );
1058 release_handle_ptr( ptr );
1059 return ret;
1060 }
1061
1062 /***********************************************************************
1063 * wglReleasePbufferDCARB
1064 *
1065 * Provided by the WGL_ARB_pbuffer extension.
1066 */
1067 int WINAPI wglReleasePbufferDCARB( HPBUFFERARB handle, HDC hdc )
1068 {
1069 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1070 BOOL ret;
1071
1072 if (!ptr) return FALSE;
1073 ret = ptr->funcs->ext.p_wglReleasePbufferDCARB( ptr->u.pbuffer, hdc );
1074 release_handle_ptr( ptr );
1075 return ret;
1076 }
1077
1078 /***********************************************************************
1079 * wglDestroyPbufferARB
1080 *
1081 * Provided by the WGL_ARB_pbuffer extension.
1082 */
1083 BOOL WINAPI wglDestroyPbufferARB( HPBUFFERARB handle )
1084 {
1085 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1086
1087 if (!ptr) return FALSE;
1088 ptr->funcs->ext.p_wglDestroyPbufferARB( ptr->u.pbuffer );
1089 free_handle_ptr( ptr );
1090 return TRUE;
1091 }
1092
1093 /***********************************************************************
1094 * wglQueryPbufferARB
1095 *
1096 * Provided by the WGL_ARB_pbuffer extension.
1097 */
1098 BOOL WINAPI wglQueryPbufferARB( HPBUFFERARB handle, int attrib, int *value )
1099 {
1100 struct wgl_handle *ptr = get_handle_ptr( handle, HANDLE_PBUFFER );
1101 BOOL ret;
1102
1103 if (!ptr) return FALSE;
1104 ret = ptr->funcs->ext.p_wglQueryPbufferARB( ptr->u.pbuffer, attrib, value );
1105 release_handle_ptr( ptr );
1106 return ret;
1107 }
1108
1109 /***********************************************************************
1110 * wglUseFontBitmaps_common
1111 */
1112 static BOOL wglUseFontBitmaps_common( HDC hdc, DWORD first, DWORD count, DWORD listBase, BOOL unicode )
1113 {
1114 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1115 GLYPHMETRICS gm;
1116 unsigned int glyph, size = 0;
1117 void *bitmap = NULL, *gl_bitmap = NULL;
1118 int org_alignment;
1119 BOOL ret = TRUE;
1120
1121 funcs->gl.p_glGetIntegerv(GL_UNPACK_ALIGNMENT, &org_alignment);
1122 funcs->gl.p_glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
1123
1124 for (glyph = first; glyph < first + count; glyph++) {
1125 unsigned int needed_size, height, width, width_int;
1126
1127 if (unicode)
1128 needed_size = GetGlyphOutlineW(hdc, glyph, GGO_BITMAP, &gm, 0, NULL, &identity);
1129 else
1130 needed_size = GetGlyphOutlineA(hdc, glyph, GGO_BITMAP, &gm, 0, NULL, &identity);
1131
1132 TRACE("Glyph: %3d / List: %d size %d\n", glyph, listBase, needed_size);
1133 if (needed_size == GDI_ERROR) {
1134 ret = FALSE;
1135 break;
1136 }
1137
1138 if (needed_size > size) {
1139 size = needed_size;
1140 HeapFree(GetProcessHeap(), 0, bitmap);
1141 HeapFree(GetProcessHeap(), 0, gl_bitmap);
1142 bitmap = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
1143 gl_bitmap = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
1144 }
1145 if (needed_size != 0) {
1146 if (unicode)
1147 ret = (GetGlyphOutlineW(hdc, glyph, GGO_BITMAP, &gm,
1148 size, bitmap, &identity) != GDI_ERROR);
1149 else
1150 ret = (GetGlyphOutlineA(hdc, glyph, GGO_BITMAP, &gm,
1151 size, bitmap, &identity) != GDI_ERROR);
1152 if (!ret) break;
1153 }
1154
1155 if (TRACE_ON(wgl)) {
1156 unsigned int bitmask;
1157 unsigned char *bitmap_ = bitmap;
1158
1159 TRACE(" - bbox: %d x %d\n", gm.gmBlackBoxX, gm.gmBlackBoxY);
1160 TRACE(" - origin: (%d, %d)\n", gm.gmptGlyphOrigin.x, gm.gmptGlyphOrigin.y);
1161 TRACE(" - increment: %d - %d\n", gm.gmCellIncX, gm.gmCellIncY);
1162 if (needed_size != 0) {
1163 TRACE(" - bitmap:\n");
1164 for (height = 0; height < gm.gmBlackBoxY; height++) {
1165 TRACE(" ");
1166 for (width = 0, bitmask = 0x80; width < gm.gmBlackBoxX; width++, bitmask >>= 1) {
1167 if (bitmask == 0) {
1168 bitmap_ += 1;
1169 bitmask = 0x80;
1170 }
1171 if (*bitmap_ & bitmask)
1172 TRACE("*");
1173 else
1174 TRACE(" ");
1175 }
1176 bitmap_ += (4 - ((UINT_PTR)bitmap_ & 0x03));
1177 TRACE("\n");
1178 }
1179 }
1180 }
1181
1182 /* In OpenGL, the bitmap is drawn from the bottom to the top... So we need to invert the
1183 * glyph for it to be drawn properly.
1184 */
1185 if (needed_size != 0) {
1186 width_int = (gm.gmBlackBoxX + 31) / 32;
1187 for (height = 0; height < gm.gmBlackBoxY; height++) {
1188 for (width = 0; width < width_int; width++) {
1189 ((int *) gl_bitmap)[(gm.gmBlackBoxY - height - 1) * width_int + width] =
1190 ((int *) bitmap)[height * width_int + width];
1191 }
1192 }
1193 }
1194
1195 funcs->gl.p_glNewList(listBase++, GL_COMPILE);
1196 if (needed_size != 0) {
1197 funcs->gl.p_glBitmap(gm.gmBlackBoxX, gm.gmBlackBoxY,
1198 0 - gm.gmptGlyphOrigin.x, (int) gm.gmBlackBoxY - gm.gmptGlyphOrigin.y,
1199 gm.gmCellIncX, gm.gmCellIncY,
1200 gl_bitmap);
1201 } else {
1202 /* This is the case of 'empty' glyphs like the space character */
1203 funcs->gl.p_glBitmap(0, 0, 0, 0, gm.gmCellIncX, gm.gmCellIncY, NULL);
1204 }
1205 funcs->gl.p_glEndList();
1206 }
1207
1208 funcs->gl.p_glPixelStorei(GL_UNPACK_ALIGNMENT, org_alignment);
1209 HeapFree(GetProcessHeap(), 0, bitmap);
1210 HeapFree(GetProcessHeap(), 0, gl_bitmap);
1211 return ret;
1212 }
1213
1214 /***********************************************************************
1215 * wglUseFontBitmapsA (OPENGL32.@)
1216 */
1217 BOOL WINAPI wglUseFontBitmapsA(HDC hdc, DWORD first, DWORD count, DWORD listBase)
1218 {
1219 return wglUseFontBitmaps_common( hdc, first, count, listBase, FALSE );
1220 }
1221
1222 /***********************************************************************
1223 * wglUseFontBitmapsW (OPENGL32.@)
1224 */
1225 BOOL WINAPI wglUseFontBitmapsW(HDC hdc, DWORD first, DWORD count, DWORD listBase)
1226 {
1227 return wglUseFontBitmaps_common( hdc, first, count, listBase, TRUE );
1228 }
1229
1230 static void fixed_to_double(POINTFX fixed, UINT em_size, GLdouble vertex[3])
1231 {
1232 vertex[0] = (fixed.x.value + (GLdouble)fixed.x.fract / (1 << 16)) / em_size;
1233 vertex[1] = (fixed.y.value + (GLdouble)fixed.y.fract / (1 << 16)) / em_size;
1234 vertex[2] = 0.0;
1235 }
1236
1237 static void WINAPI tess_callback_vertex(GLvoid *vertex)
1238 {
1239 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1240 GLdouble *dbl = vertex;
1241 TRACE("%f, %f, %f\n", dbl[0], dbl[1], dbl[2]);
1242 funcs->gl.p_glVertex3dv(vertex);
1243 }
1244
1245 static void WINAPI tess_callback_begin(GLenum which)
1246 {
1247 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1248 TRACE("%d\n", which);
1249 funcs->gl.p_glBegin(which);
1250 }
1251
1252 static void WINAPI tess_callback_end(void)
1253 {
1254 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1255 TRACE("\n");
1256 funcs->gl.p_glEnd();
1257 }
1258
1259 typedef struct _bezier_vector {
1260 GLdouble x;
1261 GLdouble y;
1262 } bezier_vector;
1263
1264 static double bezier_deviation_squared(const bezier_vector *p)
1265 {
1266 bezier_vector deviation;
1267 bezier_vector vertex;
1268 bezier_vector base;
1269 double base_length;
1270 double dot;
1271
1272 vertex.x = (p[0].x + p[1].x*2 + p[2].x)/4 - p[0].x;
1273 vertex.y = (p[0].y + p[1].y*2 + p[2].y)/4 - p[0].y;
1274
1275 base.x = p[2].x - p[0].x;
1276 base.y = p[2].y - p[0].y;
1277
1278 base_length = sqrt(base.x*base.x + base.y*base.y);
1279 base.x /= base_length;
1280 base.y /= base_length;
1281
1282 dot = base.x*vertex.x + base.y*vertex.y;
1283 dot = min(max(dot, 0.0), base_length);
1284 base.x *= dot;
1285 base.y *= dot;
1286
1287 deviation.x = vertex.x-base.x;
1288 deviation.y = vertex.y-base.y;
1289
1290 return deviation.x*deviation.x + deviation.y*deviation.y;
1291 }
1292
1293 static int bezier_approximate(const bezier_vector *p, bezier_vector *points, FLOAT deviation)
1294 {
1295 bezier_vector first_curve[3];
1296 bezier_vector second_curve[3];
1297 bezier_vector vertex;
1298 int total_vertices;
1299
1300 if(bezier_deviation_squared(p) <= deviation*deviation)
1301 {
1302 if(points)
1303 *points = p[2];
1304 return 1;
1305 }
1306
1307 vertex.x = (p[0].x + p[1].x*2 + p[2].x)/4;
1308 vertex.y = (p[0].y + p[1].y*2 + p[2].y)/4;
1309
1310 first_curve[0] = p[0];
1311 first_curve[1].x = (p[0].x + p[1].x)/2;
1312 first_curve[1].y = (p[0].y + p[1].y)/2;
1313 first_curve[2] = vertex;
1314
1315 second_curve[0] = vertex;
1316 second_curve[1].x = (p[2].x + p[1].x)/2;
1317 second_curve[1].y = (p[2].y + p[1].y)/2;
1318 second_curve[2] = p[2];
1319
1320 total_vertices = bezier_approximate(first_curve, points, deviation);
1321 if(points)
1322 points += total_vertices;
1323 total_vertices += bezier_approximate(second_curve, points, deviation);
1324 return total_vertices;
1325 }
1326
1327 /***********************************************************************
1328 * wglUseFontOutlines_common
1329 */
1330 static BOOL wglUseFontOutlines_common(HDC hdc,
1331 DWORD first,
1332 DWORD count,
1333 DWORD listBase,
1334 FLOAT deviation,
1335 FLOAT extrusion,
1336 int format,
1337 LPGLYPHMETRICSFLOAT lpgmf,
1338 BOOL unicode)
1339 {
1340 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1341 UINT glyph;
1342 GLUtesselator *tess = NULL;
1343 LOGFONTW lf;
1344 HFONT old_font, unscaled_font;
1345 UINT em_size = 1024;
1346 RECT rc;
1347
1348 TRACE("(%p, %d, %d, %d, %f, %f, %d, %p, %s)\n", hdc, first, count,
1349 listBase, deviation, extrusion, format, lpgmf, unicode ? "W" : "A");
1350
1351 if(deviation <= 0.0)
1352 deviation = 1.0/em_size;
1353
1354 if(format == WGL_FONT_POLYGONS)
1355 {
1356 tess = gluNewTess();
1357 if(!tess)
1358 {
1359 ERR("glu32 is required for this function but isn't available\n");
1360 return FALSE;
1361 }
1362 gluTessCallback(tess, GLU_TESS_VERTEX, (void *)tess_callback_vertex);
1363 gluTessCallback(tess, GLU_TESS_BEGIN, (void *)tess_callback_begin);
1364 gluTessCallback(tess, GLU_TESS_END, tess_callback_end);
1365 }
1366
1367 GetObjectW(GetCurrentObject(hdc, OBJ_FONT), sizeof(lf), &lf);
1368 rc.left = rc.right = rc.bottom = 0;
1369 rc.top = em_size;
1370 DPtoLP(hdc, (POINT*)&rc, 2);
1371 lf.lfHeight = -abs(rc.top - rc.bottom);
1372 lf.lfOrientation = lf.lfEscapement = 0;
1373 unscaled_font = CreateFontIndirectW(&lf);
1374 old_font = SelectObject(hdc, unscaled_font);
1375
1376 for (glyph = first; glyph < first + count; glyph++)
1377 {
1378 DWORD needed;
1379 GLYPHMETRICS gm;
1380 BYTE *buf;
1381 TTPOLYGONHEADER *pph;
1382 TTPOLYCURVE *ppc;
1383 GLdouble *vertices = NULL;
1384 int vertex_total = -1;
1385
1386 if(unicode)
1387 needed = GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
1388 else
1389 needed = GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
1390
1391 if(needed == GDI_ERROR)
1392 goto error;
1393
1394 buf = HeapAlloc(GetProcessHeap(), 0, needed);
1395
1396 if(unicode)
1397 GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
1398 else
1399 GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
1400
1401 TRACE("glyph %d\n", glyph);
1402
1403 if(lpgmf)
1404 {
1405 lpgmf->gmfBlackBoxX = (float)gm.gmBlackBoxX / em_size;
1406 lpgmf->gmfBlackBoxY = (float)gm.gmBlackBoxY / em_size;
1407 lpgmf->gmfptGlyphOrigin.x = (float)gm.gmptGlyphOrigin.x / em_size;
1408 lpgmf->gmfptGlyphOrigin.y = (float)gm.gmptGlyphOrigin.y / em_size;
1409 lpgmf->gmfCellIncX = (float)gm.gmCellIncX / em_size;
1410 lpgmf->gmfCellIncY = (float)gm.gmCellIncY / em_size;
1411
1412 TRACE("%fx%f at %f,%f inc %f,%f\n", lpgmf->gmfBlackBoxX, lpgmf->gmfBlackBoxY,
1413 lpgmf->gmfptGlyphOrigin.x, lpgmf->gmfptGlyphOrigin.y, lpgmf->gmfCellIncX, lpgmf->gmfCellIncY);
1414 lpgmf++;
1415 }
1416
1417 funcs->gl.p_glNewList(listBase++, GL_COMPILE);
1418 funcs->gl.p_glFrontFace(GL_CCW);
1419 if(format == WGL_FONT_POLYGONS)
1420 {
1421 funcs->gl.p_glNormal3d(0.0, 0.0, 1.0);
1422 gluTessNormal(tess, 0, 0, 1);
1423 gluTessBeginPolygon(tess, NULL);
1424 }
1425
1426 while(!vertices)
1427 {
1428 if(vertex_total != -1)
1429 vertices = HeapAlloc(GetProcessHeap(), 0, vertex_total * 3 * sizeof(GLdouble));
1430 vertex_total = 0;
1431
1432 pph = (TTPOLYGONHEADER*)buf;
1433 while((BYTE*)pph < buf + needed)
1434 {
1435 GLdouble previous[3];
1436 fixed_to_double(pph->pfxStart, em_size, previous);
1437
1438 if(vertices)
1439 TRACE("\tstart %d, %d\n", pph->pfxStart.x.value, pph->pfxStart.y.value);
1440
1441 if(format == WGL_FONT_POLYGONS)
1442 gluTessBeginContour(tess);
1443 else
1444 funcs->gl.p_glBegin(GL_LINE_LOOP);
1445
1446 if(vertices)
1447 {
1448 fixed_to_double(pph->pfxStart, em_size, vertices);
1449 if(format == WGL_FONT_POLYGONS)
1450 gluTessVertex(tess, vertices, vertices);
1451 else
1452 funcs->gl.p_glVertex3d(vertices[0], vertices[1], vertices[2]);
1453 vertices += 3;
1454 }
1455 vertex_total++;
1456
1457 ppc = (TTPOLYCURVE*)((char*)pph + sizeof(*pph));
1458 while((char*)ppc < (char*)pph + pph->cb)
1459 {
1460 int i, j;
1461 int num;
1462
1463 switch(ppc->wType) {
1464 case TT_PRIM_LINE:
1465 for(i = 0; i < ppc->cpfx; i++)
1466 {
1467 if(vertices)
1468 {
1469 TRACE("\t\tline to %d, %d\n",
1470 ppc->apfx[i].x.value, ppc->apfx[i].y.value);
1471 fixed_to_double(ppc->apfx[i], em_size, vertices);
1472 if(format == WGL_FONT_POLYGONS)
1473 gluTessVertex(tess, vertices, vertices);
1474 else
1475 funcs->gl.p_glVertex3d(vertices[0], vertices[1], vertices[2]);
1476 vertices += 3;
1477 }
1478 fixed_to_double(ppc->apfx[i], em_size, previous);
1479 vertex_total++;
1480 }
1481 break;
1482
1483 case TT_PRIM_QSPLINE:
1484 for(i = 0; i < ppc->cpfx-1; i++)
1485 {
1486 bezier_vector curve[3];
1487 bezier_vector *points;
1488 GLdouble curve_vertex[3];
1489
1490 if(vertices)
1491 TRACE("\t\tcurve %d,%d %d,%d\n",
1492 ppc->apfx[i].x.value, ppc->apfx[i].y.value,
1493 ppc->apfx[i + 1].x.value, ppc->apfx[i + 1].y.value);
1494
1495 curve[0].x = previous[0];
1496 curve[0].y = previous[1];
1497 fixed_to_double(ppc->apfx[i], em_size, curve_vertex);
1498 curve[1].x = curve_vertex[0];
1499 curve[1].y = curve_vertex[1];
1500 fixed_to_double(ppc->apfx[i + 1], em_size, curve_vertex);
1501 curve[2].x = curve_vertex[0];
1502 curve[2].y = curve_vertex[1];
1503 if(i < ppc->cpfx-2)
1504 {
1505 curve[2].x = (curve[1].x + curve[2].x)/2;
1506 curve[2].y = (curve[1].y + curve[2].y)/2;
1507 }
1508 num = bezier_approximate(curve, NULL, deviation);
1509 points = HeapAlloc(GetProcessHeap(), 0, num*sizeof(bezier_vector));
1510 num = bezier_approximate(curve, points, deviation);
1511 vertex_total += num;
1512 if(vertices)
1513 {
1514 for(j=0; j<num; j++)
1515 {
1516 TRACE("\t\t\tvertex at %f,%f\n", points[j].x, points[j].y);
1517 vertices[0] = points[j].x;
1518 vertices[1] = points[j].y;
1519 vertices[2] = 0.0;
1520 if(format == WGL_FONT_POLYGONS)
1521 gluTessVertex(tess, vertices, vertices);
1522 else
1523 funcs->gl.p_glVertex3d(vertices[0], vertices[1], vertices[2]);
1524 vertices += 3;
1525 }
1526 }
1527 HeapFree(GetProcessHeap(), 0, points);
1528 previous[0] = curve[2].x;
1529 previous[1] = curve[2].y;
1530 }
1531 break;
1532 default:
1533 ERR("\t\tcurve type = %d\n", ppc->wType);
1534 if(format == WGL_FONT_POLYGONS)
1535 gluTessEndContour(tess);
1536 else
1537 funcs->gl.p_glEnd();
1538 goto error_in_list;
1539 }
1540
1541 ppc = (TTPOLYCURVE*)((char*)ppc + sizeof(*ppc) +
1542 (ppc->cpfx - 1) * sizeof(POINTFX));
1543 }
1544 if(format == WGL_FONT_POLYGONS)
1545 gluTessEndContour(tess);
1546 else
1547 funcs->gl.p_glEnd();
1548 pph = (TTPOLYGONHEADER*)((char*)pph + pph->cb);
1549 }
1550 }
1551
1552 error_in_list:
1553 if(format == WGL_FONT_POLYGONS)
1554 gluTessEndPolygon(tess);
1555 funcs->gl.p_glTranslated((GLdouble)gm.gmCellIncX / em_size, (GLdouble)gm.gmCellIncY / em_size, 0.0);
1556 funcs->gl.p_glEndList();
1557 HeapFree(GetProcessHeap(), 0, buf);
1558 HeapFree(GetProcessHeap(), 0, vertices);
1559 }
1560
1561 error:
1562 DeleteObject(SelectObject(hdc, old_font));
1563 if(format == WGL_FONT_POLYGONS)
1564 gluDeleteTess(tess);
1565 return TRUE;
1566
1567 }
1568
1569 /***********************************************************************
1570 * wglUseFontOutlinesA (OPENGL32.@)
1571 */
1572 BOOL WINAPI wglUseFontOutlinesA(HDC hdc,
1573 DWORD first,
1574 DWORD count,
1575 DWORD listBase,
1576 FLOAT deviation,
1577 FLOAT extrusion,
1578 int format,
1579 LPGLYPHMETRICSFLOAT lpgmf)
1580 {
1581 return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, FALSE);
1582 }
1583
1584 /***********************************************************************
1585 * wglUseFontOutlinesW (OPENGL32.@)
1586 */
1587 BOOL WINAPI wglUseFontOutlinesW(HDC hdc,
1588 DWORD first,
1589 DWORD count,
1590 DWORD listBase,
1591 FLOAT deviation,
1592 FLOAT extrusion,
1593 int format,
1594 LPGLYPHMETRICSFLOAT lpgmf)
1595 {
1596 return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, TRUE);
1597 }
1598
1599 /***********************************************************************
1600 * glDebugEntry (OPENGL32.@)
1601 */
1602 GLint WINAPI glDebugEntry( GLint unknown1, GLint unknown2 )
1603 {
1604 return 0;
1605 }
1606
1607 static GLubyte *filter_extensions_list(const char *extensions, const char *disabled)
1608 {
1609 char *p, *str;
1610 const char *end;
1611
1612 p = str = HeapAlloc(GetProcessHeap(), 0, strlen(extensions) + 2);
1613 if (!str)
1614 return NULL;
1615
1616 TRACE( "GL_EXTENSIONS:\n" );
1617
1618 for (;;)
1619 {
1620 while (*extensions == ' ')
1621 extensions++;
1622 if (!*extensions)
1623 break;
1624 if (!(end = strchr(extensions, ' ')))
1625 end = extensions + strlen(extensions);
1626 memcpy(p, extensions, end - extensions);
1627 p[end - extensions] = 0;
1628 if (!has_extension(disabled, p, strlen(p)))
1629 {
1630 TRACE("++ %s\n", p);
1631 p += end - extensions;
1632 *p++ = ' ';
1633 }
1634 else
1635 {
1636 TRACE("-- %s (disabled by config)\n", p);
1637 }
1638 extensions = end;
1639 }
1640 *p = 0;
1641 return (GLubyte *)str;
1642 }
1643
1644 static GLuint *filter_extensions_index(const char *disabled)
1645 {
1646 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1647 const char *ext, *end, *gl_ext;
1648 GLuint *disabled_exts, *new_disabled_exts;
1649 unsigned int i = 0, j, disabled_size;
1650 GLint extensions_count;
1651
1652 if (!funcs->ext.p_glGetStringi)
1653 {
1654 void **func_ptr = (void **)&funcs->ext.p_glGetStringi;
1655
1656 *func_ptr = funcs->wgl.p_wglGetProcAddress("glGetStringi");
1657 if (!funcs->ext.p_glGetStringi)
1658 return NULL;
1659 }
1660
1661 funcs->gl.p_glGetIntegerv(GL_NUM_EXTENSIONS, &extensions_count);
1662 disabled_size = 2;
1663 disabled_exts = HeapAlloc(GetProcessHeap(), 0, disabled_size * sizeof(*disabled_exts));
1664 if (!disabled_exts)
1665 return NULL;
1666
1667 TRACE( "GL_EXTENSIONS:\n" );
1668
1669 for (j = 0; j < extensions_count; ++j)
1670 {
1671 gl_ext = (const char *)funcs->ext.p_glGetStringi(GL_EXTENSIONS, j);
1672 ext = disabled;
1673 for (;;)
1674 {
1675 while (*ext == ' ')
1676 ext++;
1677 if (!*ext)
1678 {
1679 TRACE("++ %s\n", gl_ext);
1680 break;
1681 }
1682 if (!(end = strchr(ext, ' ')))
1683 end = ext + strlen(ext);
1684
1685 if (!strncmp(gl_ext, ext, end - ext) && !gl_ext[end - ext])
1686 {
1687 if (i + 1 == disabled_size)
1688 {
1689 disabled_size *= 2;
1690 new_disabled_exts = HeapReAlloc(GetProcessHeap(), 0, disabled_exts,
1691 disabled_size * sizeof(*disabled_exts));
1692 if (!new_disabled_exts)
1693 {
1694 disabled_exts[i] = ~0u;
1695 return disabled_exts;
1696 }
1697 disabled_exts = new_disabled_exts;
1698 }
1699 TRACE("-- %s (disabled by config)\n", gl_ext);
1700 disabled_exts[i++] = j;
1701 break;
1702 }
1703 ext = end;
1704 }
1705 }
1706 disabled_exts[i] = ~0u;
1707 return disabled_exts;
1708 }
1709
1710 /* build the extension string by filtering out the disabled extensions */
1711 static BOOL filter_extensions(const char *extensions, GLubyte **exts_list, GLuint **disabled_exts)
1712 {
1713 static const char *disabled;
1714
1715 if (!disabled)
1716 {
1717 HKEY hkey;
1718 DWORD size;
1719 char *str = NULL;
1720
1721 /* @@ Wine registry key: HKCU\Software\Wine\OpenGL */
1722 if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\OpenGL", &hkey ))
1723 {
1724 if (!RegQueryValueExA( hkey, "DisabledExtensions", 0, NULL, NULL, &size ))
1725 {
1726 str = HeapAlloc( GetProcessHeap(), 0, size );
1727 if (RegQueryValueExA( hkey, "DisabledExtensions", 0, NULL, (BYTE *)str, &size )) *str = 0;
1728 }
1729 RegCloseKey( hkey );
1730 }
1731 if (str)
1732 {
1733 if (InterlockedCompareExchangePointer( (void **)&disabled, str, NULL ))
1734 HeapFree( GetProcessHeap(), 0, str );
1735 }
1736 else disabled = "";
1737 }
1738
1739 if (!disabled[0])
1740 return FALSE;
1741
1742 if (extensions && !*exts_list)
1743 *exts_list = filter_extensions_list(extensions, disabled);
1744
1745 if (!*disabled_exts)
1746 *disabled_exts = filter_extensions_index(disabled);
1747
1748 return (exts_list && *exts_list) || *disabled_exts;
1749 }
1750
1751 /***********************************************************************
1752 * glGetString (OPENGL32.@)
1753 */
1754 const GLubyte * WINAPI glGetString( GLenum name )
1755 {
1756 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1757 const GLubyte *ret = funcs->gl.p_glGetString( name );
1758
1759 if (name == GL_EXTENSIONS && ret)
1760 {
1761 struct wgl_handle *ptr = get_current_context_ptr();
1762 if (ptr->u.context->extensions ||
1763 filter_extensions((const char *)ret, &ptr->u.context->extensions, &ptr->u.context->disabled_exts))
1764 ret = ptr->u.context->extensions;
1765 }
1766 return ret;
1767 }
1768
1769 /* wrapper for glDebugMessageCallback* functions */
1770 static void gl_debug_message_callback( GLenum source, GLenum type, GLuint id, GLenum severity,
1771 GLsizei length, const GLchar *message,const void *userParam )
1772 {
1773 struct wgl_handle *ptr = (struct wgl_handle *)userParam;
1774 if (!ptr->u.context->debug_callback) return;
1775 ptr->u.context->debug_callback( source, type, id, severity, length, message, ptr->u.context->debug_user );
1776 }
1777
1778 /***********************************************************************
1779 * glDebugMessageCallback
1780 */
1781 void WINAPI glDebugMessageCallback( GLDEBUGPROC callback, const void *userParam )
1782 {
1783 struct wgl_handle *ptr = get_current_context_ptr();
1784 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1785
1786 TRACE( "(%p, %p)\n", callback, userParam );
1787
1788 ptr->u.context->debug_callback = callback;
1789 ptr->u.context->debug_user = userParam;
1790 funcs->ext.p_glDebugMessageCallback( gl_debug_message_callback, ptr );
1791 }
1792
1793 /***********************************************************************
1794 * glDebugMessageCallbackAMD
1795 */
1796 void WINAPI glDebugMessageCallbackAMD( GLDEBUGPROCAMD callback, void *userParam )
1797 {
1798 struct wgl_handle *ptr = get_current_context_ptr();
1799 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1800
1801 TRACE( "(%p, %p)\n", callback, userParam );
1802
1803 ptr->u.context->debug_callback = callback;
1804 ptr->u.context->debug_user = userParam;
1805 funcs->ext.p_glDebugMessageCallbackAMD( gl_debug_message_callback, ptr );
1806 }
1807
1808 /***********************************************************************
1809 * glDebugMessageCallbackARB
1810 */
1811 void WINAPI glDebugMessageCallbackARB( GLDEBUGPROCARB callback, const void *userParam )
1812 {
1813 struct wgl_handle *ptr = get_current_context_ptr();
1814 const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
1815
1816 TRACE( "(%p, %p)\n", callback, userParam );
1817
1818 ptr->u.context->debug_callback = callback;
1819 ptr->u.context->debug_user = userParam;
1820 funcs->ext.p_glDebugMessageCallbackARB( gl_debug_message_callback, ptr );
1821 }
1822
1823 /***********************************************************************
1824 * OpenGL initialisation routine
1825 */
1826 BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
1827 {
1828 switch(reason)
1829 {
1830 case DLL_PROCESS_ATTACH:
1831 NtCurrentTeb()->glTable = &null_opengl_funcs;
1832 break;
1833 case DLL_THREAD_ATTACH:
1834 NtCurrentTeb()->glTable = &null_opengl_funcs;
1835 break;
1836 }
1837 return TRUE;
1838 }
Windows API implementation